- CC := avr-gcc
- LD := avr-ld
- OBJCOPY := avr-objcopy
- OBJDUMP := avr-objdump
- SIZE := avr-size
-
- TARGET = twiboot
- SOURCE = $(wildcard *.c)
-
- # select MCU
- MCU = atmega88
-
- AVRDUDE_PROG := -c avr910 -b 115200 -P /dev/ttyUSB0
- #AVRDUDE_PROG := -c dragon_isp -P usb
-
- # ---------------------------------------------------------------------------
-
- ifeq ($(MCU), atmega8)
- # atmega8:
- # Fuse L: 0x84 (8Mhz internal RC-Osz., 2.7V BOD)
- # Fuse H: 0xda (512 words bootloader)
- AVRDUDE_MCU=m8
- AVRDUDE_FUSES=lfuse:w:0x84:m hfuse:w:0xda:m
-
- BOOTLOADER_START=0x1C00
- endif
-
- ifeq ($(MCU), atmega88)
- # atmega88:
- # Fuse L: 0xc2 (8Mhz internal RC-Osz.)
- # Fuse H: 0xdd (2.7V BOD)
- # Fuse E: 0xfa (512 words bootloader)
- AVRDUDE_MCU=m88
- AVRDUDE_FUSES=lfuse:w:0xc2:m hfuse:w:0xdd:m efuse:w:0xfa:m
-
- BOOTLOADER_START=0x1C00
- endif
-
- ifeq ($(MCU), atmega168)
- # atmega168:
- # Fuse L: 0xc2 (8Mhz internal RC-Osz.)
- # Fuse H: 0xdd (2.7V BOD)
- # Fuse E: 0xfa (512 words bootloader)
- AVRDUDE_MCU=m168 -F
- AVRDUDE_FUSES=lfuse:w:0xc2:m hfuse:w:0xdd:m efuse:w:0xfa:m
-
- BOOTLOADER_START=0x3C00
- endif
-
- ifeq ($(MCU), atmega328p)
- # atmega328p:
- # Fuse L: 0xc2 (8Mhz internal RC-Osz.)
- # Fuse H: 0xdc (512 words bootloader)
- # Fuse E: 0xfd (2.7V BOD)
- AVRDUDE_MCU=m328p -F
- AVRDUDE_FUSES=lfuse:w:0xc2:m hfuse:w:0xdc:m efuse:w:0xfd:m
-
- BOOTLOADER_START=0x7C00
- endif
-
- # ---------------------------------------------------------------------------
-
- CFLAGS = -pipe -g -Os -mmcu=$(MCU) -Wall -fdata-sections -ffunction-sections
- CFLAGS += -Wa,-adhlns=$(*F).lst -DBOOTLOADER_START=$(BOOTLOADER_START)
- LDFLAGS = -Wl,-Map,$(@:.elf=.map),--cref,--relax,--gc-sections,--section-start=.text=$(BOOTLOADER_START)
- LDFLAGS += -nostartfiles
-
- # ---------------------------------------------------------------------------
-
- $(TARGET): $(TARGET).elf
- @$(SIZE) -B -x --mcu=$(MCU) $<
-
- $(TARGET).elf: $(SOURCE:.c=.o)
- @echo " Linking file: $@"
- @$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
- @$(OBJDUMP) -h -S $@ > $(@:.elf=.lss)
- @$(OBJCOPY) -j .text -j .data -O ihex $@ $(@:.elf=.hex)
- @$(OBJCOPY) -j .text -j .data -O binary $@ $(@:.elf=.bin)
-
- %.o: %.c $(MAKEFILE_LIST)
- @echo " Building file: $<"
- @$(CC) $(CFLAGS) -o $@ -c $<
-
- clean:
- rm -rf $(SOURCE:.c=.o) $(SOURCE:.c=.lst) $(addprefix $(TARGET), .elf .map .lss .hex .bin)
-
- install: $(TARGET).elf
- avrdude $(AVRDUDE_PROG) -p $(AVRDUDE_MCU) -U flash:w:$(<:.elf=.hex)
-
- fuses:
- avrdude $(AVRDUDE_PROG) -p $(AVRDUDE_MCU) $(patsubst %,-U %, $(AVRDUDE_FUSES))
|